More and more videos are now being used in e-learning context. For improving learning effect, to understand how students view the online video is important. In this research, we investigate how students deploy their attention when they learn through interactive slide video in the aim of better understanding observers' learning style. Felder and Silverman's learning style scale was applied to identify learner's learning preference. Participants' eye movement was recorded in an eye-tracking lab. "Eye-mind" assumption is supported by a mild correlation between posttest score and viewing ratio. Different viewing behavior of different learners with strong and intermediate visual learning preference is investigated. Some eye movement metrics like fixation time, speed and direction related to global and sequential learning style are investigated. The result showed a high consistence with corresponding learning style characteristics, which provides another way to verify the validity of learning style. Possible applications such as incorporating with adaptive learning management system are discussed. (Contains 3 figures and 8 tables.)